17. A bag contains 18 balls out of which x balls are red.
I.
If one ball is drawn at random from the bag, what is the
probability that it is red ball?
II. If 2 more red balls are put in the bag, the probability of drawing
a red ball will be times that of probability of red ball. Find x.
8
Answers
Answered by
2
Answer:
Probability of red ball =
total no of ball
Favourable ball
(i) P[red ball]=
18
x
(ii) If two more red ball add
no. of red ball =x+2
total no. of balls =18+2=20
Probability of druuing red ball =
8
9
Probability of red ball coming in part (i)
∴
20
x+2
=
8
9
×
18
x
∴
20
x+2
=
16
x
∴ 16(x+2)=20 x
∴ 16 x+32=20 x
∴ 20 x−16 x=32
∴ 4 x=32
∴ x=8
→ the value of x=8
Answered by
0
Answer:
1st x/18
2nd probability will be 2x/18
and x= 9
Step-by-step explanation:
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